OEM Carrier Transformer 40VA 120V to 24V for Model FIOP060B301GA

This OEM replacement transformer (part number HT01BD209) is the factory-specified control circuit transformer for the Carrier FIOP060B301GA packaged unit. Its sole but critical job is to step down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, contactor coil, and every low-voltage component in the system. When this transformer fails, the entire control circuit goes dark — the thermostat goes blank, the system stops responding to any call for heating or cooling, and nothing turns on. It is often the first component to inspect when a unit appears completely dead with no obvious electrical faults upstream.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 output | Compatible with standard 24V HVAC control circuits | OEM part number HT01BD209
• OEM vs Generic: This OEM transformer is wound and rated to Carrier's exact factory specification, ensuring stable 24V output under full load. Generic transformers frequently use undersized windings that sag under load, causing intermittent lockouts, nuisance tripping of fuses, and premature control board failures.
• Install difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all wiring connections before removal. Secondary fuse (typically 3A) should also be inspected and replaced if blown.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier FIOP060B301GA packaged unit. Always verify your existing transformer's VA rating and primary/secondary voltages on the data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — reach out before ordering if you have any questions.